19873097 has 2 divisors, whose sum is σ = 19873098. Its totient is φ = 19873096.

The previous prime is 19873079. The next prime is 19873099. The reversal of 19873097 is 79037891.

Together with previous prime (19873079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19855936 + 17161 = 4456^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 19873097 - 2¹⁶ = 19807561 is a prime.

Together with 19873099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19873099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9936548 + 9936549.

It is an arithmetic number, because the mean of its divisors is an integer number (9936549).

Almost surely, 2^19873097 is an apocalyptic number.

It is an amenable number.

19873097 is a deficient number, since it is larger than the sum of its proper divisors (1).

19873097 is an equidigital number, since it uses as much as digits as its factorization.

19873097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 19873097 is about 4457.9251900408. The cubic root of 19873097 is about 270.8664301854.

The spelling of 19873097 in words is "nineteen million, eight hundred seventy-three thousand, ninety-seven".